Triassic

From Trias (“three-layered geologic strata between the Permian and Jurassic”) < German Trias < Ancient Greek τριάς (triás, “triad”), +‎ -ic. Coined in 1841 by geologist Friedrich August von Alberti (1795–1878).

• (General American) IPA^(key): /tɹaɪˈæsɪk/
• Rhymes: -æsɪk

Triassic (not comparable)

1. Of or from the geologic strata above the Permian and below the Jurassic; of or belonging to the period 250 to 200 million years ago when these strata were laid down.
   • 1990, Michael Crichton, Jurassic Park, Alfred A. Knopf, p 45:

     “Well,” Ellie said. “We know animals have survived. Crocodiles are basically Triassic animals living in the present. Sharks are Triassic. So we know it has happened before.”

Triassic

1. (geology) A geologic period within the Mesozoic era, comprising lower, middle and upper epochs from about 250 to 200 million years ago.

• Trias

• Appendix:Geologic timescale

• sarcitis